Gregory the Great — on Rev 22:9 (Forty Gospel Homilies, Homily 8)

“This is why Lot and Joshua worshipped angels and were not forbidden to worship; but John in his Apocalypse wished to worship an angel, yet that same angel restrained him from worshipping him, saying: See that you do not do this, for I am your fellow servant and of your brethren. Why is it that before the Redeemer's coming angels are worshipped by men and remain silent, but afterward they refuse to be worshipped, unless it is that our nature, which they had previously despised, they now fear to see prostrate before them after they behold it assumed above themselves? Nor do they now dare to scorn as weak what is beneath them, since they venerate it above themselves in the King of heaven. Nor do they disdain to have man as a companion, since they adore man as God above themselves.”